World Rally 2: Twin Racing (MASK ROM version): Difference between revisions
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|1x || [[27080|MASKROM 1Mx8]] || 68 || dumped | |1x || [[27080|MASKROM 1Mx8]] || 68 || dumped | ||
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|2x || [[27160|MASKROM 1Mx16]] || 69,70 || dumped | |2x || [[27160|MASKROM 1Mx16]] || 69,70 || dumped, maybe bad dump | ||
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1) Gaelco custom chip is 449 instead of 506<br> | 1) Gaelco custom chip is 449 instead of 506<br> | ||
2) total EPROMs size is less than in revision 950510 (more specifically it looks like the content of 09,10,16,17 is missing)<br> | 2) total EPROMs size is less than in revision 950510 (more specifically it looks like the content of 09,10,16,17 is missing)<br> | ||
The PCB is totally dead, therefore I can not make any screen comparison. | |||
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update 20180130:<br> | |||
Comment from Haze: "it's very obviously missing 2MB total rom data, so something isn't dumped at the right size. (there are no empty positions, so it's clearly a 'wrong size' error)"<br> | |||
Comment from Brian Troha: "So if it’s missing 2MB of data, one of the mask roms IC70 or IC69 is dumped at half size."<br> | |||
Comment form me: "Unfortunately this PCB was bartered for something else a long time ago, it's no more available." | |||
=Files= | =Files= | ||
Revision as of 09:49, 30 January 2018
| dumper | f205v |
| dump date | 17/01/2009 |
| emulator | |
| dev |
| name | 761 |
| description | World Rally 2: Twin Racing (different EPROMs) |
| year | 1995 |
| manufacturer | Gaelco |
Technical references
CPUs
| QTY | Type | clock | position | function |
|---|---|---|---|---|
| 1x | MC68000P12 | u48 | 16/32-bit Microprocessor - main | |
| 1x | custom GAE1-449 | u57 | main | |
| 1x | DS5002FP | u47 | Secure Microprocessor Chip | |
| 1x | oscillator | 26.000MHz | xtal1 | |
| 1x | oscillator | 34.000MHz | xtal2 |
ROMs
| QTY | Type | position | status |
|---|---|---|---|
| 2x | NM27C040Q | 62,63 | dumped |
| 1x | MASKROM 1Mx8 | 68 | dumped |
| 2x | MASKROM 1Mx16 | 69,70 | dumped, maybe bad dump |
RAMs
| QTY | Type | position |
|---|---|---|
| 4x | KM428C256J | 53,54,55,56 |
| 2x | HM3-65764E | 32,33 |
| 2x | CY7C199-20 | 75,76 |
| 2x | HM3-65756H | 49,50 |
| 1x | MB84256A | 34 |
PLDs
| QTY | Type | position | status |
|---|---|---|---|
| 1x | TI F20L8-25CNT | 39 | read protected |
| 1x | TI F16R8-15CN | 27 | read protected |
| 1x | TI F16L8-25CN | 30 | read protected |
Others
1x JAMMA edge connector
1x 6 legs connector (conn1)
1x 15 legs connector (conn2)
1x 4 legs connector (conn4)
2x trimmer (volume)(p1,p2)
1x battery 3V
Notes
This is the same PCB revision (950510-1) as already documented in MAME source gaelco2.c, but with a number of differences:
1) Gaelco custom chip is 449 instead of 506
2) total EPROMs size is less than in revision 950510 (more specifically it looks like the content of 09,10,16,17 is missing)
The PCB is totally dead, therefore I can not make any screen comparison.
update 20180130:
Comment from Haze: "it's very obviously missing 2MB total rom data, so something isn't dumped at the right size. (there are no empty positions, so it's clearly a 'wrong size' error)"
Comment from Brian Troha: "So if it’s missing 2MB of data, one of the mask roms IC70 or IC69 is dumped at half size."
Comment form me: "Unfortunately this PCB was bartered for something else a long time ago, it's no more available."
Files
-
PCB component side
-
PCB solder side
-
Read me
-
ROMs
761
